The difference between Full Inspection and Random Inspection


When overseas buyers purchase goods from Chinese suppliers, the quality control of the products is very important. The quality inspection of the goods is a key step in the quality control process. It can help you get accurate quality feedback before the goods leave the factory, so as to decide whether to accept the goods or specify a targeted rework plan.

If you apply for inspection services to a third-party inspection company in China, they may provide you with a variety of options. For example, when the goods are 100% completed, you can choose Full Inspection or Pre-Shipment inspection. Many clients are confused about these two types of inspection, here we will analyze their differences, as well as their advantages and disadvantages.

A. Full inspection

Full inspection refers to 100% inspection of your products according to a certain standard (or quality requirements of client).

Generally, if your order fails the random sampling inspection, you can choose full inspection. Every product is inspected to ensure that 100% of the goods meet your quality requirements.


1. Before inspection, 100% of the goods must be completed.
2. We suggest not to package products during full inspection, because inspecting unpackaged products will greatly shorten the inspection time and reduce your inspection costs. On the other hand, this can avoid the risk of damage to the product due to multiple packaging.

The scope of application of full inspection
1. Small batch, high value order.
2. Products sold online (such as Amazon)
3. If Pre-Shipment Inspection failed, we can consider full inspection.

B. Randomly sampling inspection

Randomly inspection is a sampling inspection (also called Pre-Shipment Inspection). Generally, it is a method of randomly sampling bulk goods according to internationally recognized sampling methods, and then inspecting the samples according to the specified AQL standards. The AQL standard specifies the maximum acceptable number of defects (Critical/Major/Miner) corresponding to a certain sampling quantity. If the number of defects after inspection is less than the maximum allowable value, the inspection result is PASS, and vice versa.

1. Random inspection is best performed after all the goods are completed and packaged in export cartons, which helps the inspector to randomly select the samples.
2. Try to provide the inspector with product information, quality requirements, and quality problems that occurred during the production process, so that the quality problems can be verified during the Pre-Shipment Inspection process.

The scope of application of ramdom inspection

1. Goods with certain quality requirements

2. Larger orders


Characteristics of sampling inspection:

1. Economical

Economy is one of the most significant advantages of sampling inspection. Since the sample unit of the inspection is usually a small part of the overall unit, the workload is small, which can save a lot of manpower, material resources, financial resources and time.

2. Timeliness

Due to the small workload, inspection preparation time, inspection time, data processing time, etc. can be greatly reduced, thereby improving the timeliness of inspection.

3. Wide adaptability

Sampling inspection can obtain a wider range of information, which is suitable for inspections in various fields and products. From the point of view of the scope of application and problems, its application should be wider than that of full inspection.

4. Low accuracy

Since only a part of the randomly sampled samples are inspected, if the quality of the sampled product is relatively good than average quality, some errors will inevitably occur in the inspection results, but the size of this error can be calculated and controlled, so the inferred result is usually reliable of.


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